package com.xiaolun.nio;

import java.io.File;
import java.io.FileInputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class NIOFileChannel02 {
	public static void main(String[] args) throws Exception {

		//创建文件的输入流
		File file = new File("d:\\file01.txt");
		FileInputStream fileInputStream = new FileInputStream(file);

		//通过fileInputStream 获取对应的FileChannel -> 实际类型  FileChannelImpl
		FileChannel fileChannel = fileInputStream.getChannel();

		//创建缓冲区
		ByteBuffer byteBuffer = ByteBuffer.allocate((int) file.length());

		//将 通道的数据读入到Buffer
		fileChannel.read(byteBuffer);

		//将byteBuffer 的 字节数据 转成String
		System.out.println(new String(byteBuffer.array()));
		fileInputStream.close();
	}
}
